Body Mass Index and its Impact on Outcomes of Ruptured Abdominal Aortic Aneurysms
Tiffany Liang, MD1, Paul Dimusto, MD2, Chris McAnich, MD2, Andres Fajardo, MD1, Charles Acher, MD2, Lava Raj Timsina, PhD1, Micheal Dalsing, MD1, Raghu L. Motaganahalli, MD1.
1Indiana University School of Medicine, Indianapolis, IN, USA, 2University of Wisconsin School of Medicine and Public health, Madison, WI, USA.
Objective: Ruptured Abdominal Aortic aneurysms carry significant risk of Mortality. Relationship between body mass index (BMI) and outcomes of Ruptured Abdominal Aortic Aneurysm (RAAA) has not been well defined. We report outcomes of RAAA and its association with BMI.
Methods: All patients undergoing RAAA repairs between 2008-2015 at two tertiary academic centers were included in this study. Collective data was pooled into redcap database. Patient demographics, BMI, Comorbidities, admission physiological score, type of repair, 30 day mortality were analyzed using Bivariate and Multivariate logistic regressions. Mean BMI was compared using Forest plot analysis between patients who survived RAAA and those who did not. Adjusted odds ratio was reported with 95% confidence intervals and p-values from the multivariate analysis.
Results: 176 patients underwent repair of RAAA (Endo V/S Open). Patient demographics, Length of stay, physiological scores is shown in table 1. Estimates of adjusted odds ratio are presented in Forest plot analysis as in figure. In Bivariate relationship increase in BMI was significantly associated with 30 day mortality (p=0.0389).Though marginally significant in multivariable analysis, for each 1kg/m2 increase in BMI, the likelihood of patients dying within 30 days of undergoing the repair of RAAA increased by 1.1 times, i.e. for each 10 kg/m2 increase in BMI, the patients are approximately two and half times more likely to die within 30 days than those with lower BMI (p=0.091)
Conclusion: When adjusted for the admission physiological score, type of procedure, including patient’s demographic characteristics, increase in BMI carried greater risk of 30 days mortality. 
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